Jotsum: Calculator Notepad

The notepad that does the math

Free · In‑App Purchases

Jotsum is a calculator you write in plain words. Type your math and notes on the left; the answers appear on the right, live, as you type — no equals key, no buttons, no fuss. It’s the everyday calculations you actually do: splitting a bill, converting currencies at today’s rate, working out a percentage off, adding up a trip budget, or checking how many days until a deadline. Name your values and reuse them down the page, and Jotsum keeps the whole sheet in sync. SYNCS WITH YOUR MAC Your calculations sync over iCloud, so the sheet you start on your Mac is on your iPhone — and the other way around. No account, no sign-in; it uses your own iCloud. WHAT IT DOES • Plain-language math with variables — name a number, reuse it anywhere • Live currency conversion (160+ currencies + Bitcoin/Ethereum, no API key, no login) • Units — length, mass, time, volume, data, temperature, area, speed • Percentages done the human way — “20% off 80”, “12 is what % of 60” • Dates & durations — “3 days + 5 hours”, “days until christmas”, time zones • Scientific functions — sqrt, sin/cos/tan, logs, exp, powers, plus pi, e, tau • Finance — compound interest and mortgage payments • Multiple notes, organised in a tidy list PRIVATE BY DESIGN Everything stays on your devices and your own iCloud. No account, no analytics, no tracking. Currency rates are the only network request, and the app works offline too. Light and dark, with a warm editorial look that’s easy on the eyes all day. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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Alerts. Write EUR in USD alert > 1.10 on any line and Jotsum tells you when the rate crosses your number. Part of Jotsum Pro. Note history. Every note keeps its earlier versions. Open History to see what the numbers were and restore one. Part of Jotsum Pro. Notes that read each other. Keep rent in a note called Constants and write Constants.rent anywhere else. Quick Calc on the Mac. Press Option Space in any app for a floating scratch pad. Also: a faint one-month line next to rates and stocks, hold a total to see how it splits, notes in Spotlight search, 10 AAPL now works, more currency names and symbols, and safer sync between devices.

The developer, Hrvoje Matosic, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    Hrvoje Matosic
    Size
    3.3 MB
    Category
    Productivity
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 9 more
    • English, French, German, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish, Swedish
    Age Rating
    4+
    In-App Purchases
    Yes
    • Jotsum Pro Yearly $9.99
    • Jotsum Pro $0.99
    • Jotsum Pro $29.00
    Copyright
    © 2026 Hrvoje Matosic